Re: [PATCH] pgbench --throttle (submission 7 - with lag measurement) - Mailing list pgsql-hackers

From Greg Smith
Subject Re: [PATCH] pgbench --throttle (submission 7 - with lag measurement)
Date
Msg-id 51B78705.7050603@2ndQuadrant.com
Whole thread Raw
In response to Re: [PATCH] pgbench --throttle (submission 7 - with lag measurement)  (Fabien COELHO <coelho@cri.ensmp.fr>)
Responses Re: [PATCH] pgbench --throttle (submission 7 - with lag measurement)
Re: [PATCH] pgbench --throttle (submission 7 - with lag measurement)
List pgsql-hackers
On 6/11/13 4:11 PM, Fabien COELHO wrote:
>   - ISTM that there "thread start time" should be initialized at the
>     beginning of threadRun instead of in the loop *before* thread creation,
>     otherwise the thread creation delays are incorporated in the
>     performance measure, but ISTM that the point of pgbench is not to
>     measure thread creation performance...

I noticed that, but it seemed a pretty minor issue.  Did you look at the 
giant latency spikes at the end of the test run I submitted the graph 
for?  I wanted to nail down what was causing those before worrying about 
the startup timing.

-- 
Greg Smith   2ndQuadrant US    greg@2ndQuadrant.com   Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.com



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